package com.i2silly.wxbot.utils;

import org.springframework.beans.BeansException;
import org.springframework.beans.factory.NoSuchBeanDefinitionException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;

/**
 * @description: Spring应用上下文工具
 * @author: lingang@linewell.com
 * @since: 2014年12月16日 上午11:26:00
 */
public class SpringContextUtil implements ApplicationContextAware {

	private static ApplicationContext applicationContext = null;

	public SpringContextUtil() {
	}

	@Override
	public void setApplicationContext(ApplicationContext arg0) throws BeansException {
		if (applicationContext == null) {
			applicationContext = arg0;
		}

	}

	public static ApplicationContext getApplicationContext() {
		return applicationContext;
	}

	public static void setAppCtx(ApplicationContext webAppCtx) {
		if (webAppCtx != null) {
			applicationContext = webAppCtx;
		}
	}

	/**
	 * 拿到ApplicationContext对象实例后就可以手动获取Bean的注入实例对象
	 */
	public static <T> T getBean(Class<T> clazz) {
		return getApplicationContext().getBean(clazz);
	}

	public static <T> T getBean(String name, Class<T> clazz) throws ClassNotFoundException {
		return getApplicationContext().getBean(name, clazz);
	}

	public static Object getBean(String beanName) {
		return getApplicationContext().getBean(beanName);
	}

	public static Object getBean(String beanName, String className) throws ClassNotFoundException {
		Class clz = Class.forName(className);
		return getApplicationContext().getBean(beanName, clz.getClass());
	}

	public static boolean containsBean(String name) {
		return getApplicationContext().containsBean(name);
	}

	public static boolean isSingleton(String name) throws NoSuchBeanDefinitionException {
		return getApplicationContext().isSingleton(name);
	}

	public static Class<?> getType(String name) throws NoSuchBeanDefinitionException {
		return getApplicationContext().getType(name);
	}

	public static String[] getAliases(String name) throws NoSuchBeanDefinitionException {
		return getApplicationContext().getAliases(name);
	}
}
